Baltimore Colts halfback Tom Matte grabs a touchdown pass as Detroit Lions defenders Bobby Thompson (27) and John Robinson (49) move in during the second quarter of their football game on Oct. 16, 1966 in Baltimore. (Associated Press)

Detroit Lions receiver Terry Barr, right, grabs a 19-yard touchdown pass as San Francisco 49ers' Jerry Merterns defends during a football game in Detroit on Sept. 23, 1962. (Associated Press)

Head coach and owner Paul Brown of the Cincinnati Bengals displays some of the helmet designs under consideration for his new team on April 2, 1968 in Cincinnati, Ohio. Though he favored the striped design he's holding, he went with a more conservative "BENGALS" script on the helmet. (National Football League)

Hall of Fame linebacker Dick Butkus of the Chicago Bears dives to make a stop in a 17 to 16 win over the Los Angeles Rams on December 8, 1968 at Memorial Colesium in Los Angeles, California. (National Football League)

Linebacker John Baker of the San Diego Chargers pressures Rams quarterback Roman Gabrial in a 35 to 13 preseason win over the Los Angeles Rams at San Diego Stadium in San Diego, California. (National Football League)

Dallas Cowboys running back Don Perkins eludes Washington Redskins linebacker Chris Hanburger in a 27-20 loss at the Cotton Bowl on Nov. 19, 1967. (National Football League)

New York Jets Hall of Fame quarterback Joe Namath signals that the Jets are number one after a 16-7 win over the Baltimore Colts in Super Bowl III on January 12, 1969 at Orange Bowl. Namath was voted the game's MVP after completing 17 of 28 passes. (National Football League)

Green Bay Packers wide receiver Max McGee (85) makes a juggling touchdown catch during Super Bowl I, a 35-10 victory over the Kansas City Chiefs on January 15, 1967, at the Memorial Coliseum in Los Angeles, California. (National Football League)

New York Jets Hall of Fame quarterback Joe Namath prepares to hand off in a 16-7 win over the Baltimore Colts in Super Bowl III on January 12, 1969 at Orange Bowl in Miami, Florida. (National Football League)

Cleveland Browns wide receiver Gary Collins makes a touchdown catch in a 21-20 loss to the Green Bay Packers on September 18, 1966 at Cleveland Municipal Stadium in Cleveland, Ohio. (National Football League)

Philadelphia Eagles halfback Ted Dean (35) runs wide left behind strong blocking from guard Gerry Huth in a 17-13 win over the Green Bay Packers in a League Championship game on December 26, 1960 at Franklin Field in Philadelphia, Pennsylvania. (National Football League)

Minnesota Vikings linebacker Roy Winston (60) tries to take down Cleveland Browns running back Leroy Kelly (44) during the Vikings 27-7 victory in the 1969 NFL Championship Game on January 4, 1970 at Metropolitan Stadium in Minneapolis, Minnesota. (National Football League)

Hall of Fame quarterback Bart Starr of the Green Bay Packers gets ready to fire downfield against the Los Angeles Rams at the Los Angeles Memorial Coliseum on December 16, 1962. The Packers went on to win the game 20-17. (National Football League)

Chicago Bears punter Jon Kilgore (8) punts the ball during a 17-16 victory over the Los Angeles Rams on December 8, 1968, at the Los Angeles Memorial Coliseum in Los Angeles, California. (National Football League)

New York Jets wide receiver George Sauer (83) goes airborne to make a catch during Super Bowl III, a 16-7 victory over the Baltimore Colts on January 12, 1969, at the Orange Bowl in Miami, Florida. (National Football League)

Hall of Fame linebacker Bobby Bell (78) of the Kansas City Chiefs tackles Bills fullback Carlton "Cookie" Gilchrist in a 35 to 26 loss to the Buffalo Bills on October 13, 1963 at Municipal Stadium in Kansas City, Missouri. (National Football League)

Philadelphia Eagles end Pete Retzlaff (44) runs upfield as Steelers defensive back Johnny Sample (28) closes in to make the stop in a 26 to 17 loss to the Pittsburgh Steelers on September 30, 1962 at Franklin Field in Philadelphia, Pennsylvania. (National Football League)

Philadelphia Eagles players guard Stan Campbell (67), defensive end Marion Campbell (78), quarterback Norm Van Brocklin, and center/linebacker Chuck Bednarik (60)--these last two members of the Pro Football Hall of Fame--congratulate head coach Buck Shaw after defeating the Green Bay Packers in the 1960 NFL Championship Game on December 26, 1960. (National Football League)

Atlanta Falcons quarterback Bob Berry (17) throws a pass amidst heavy pressure during a 17-7 loss to the Los Angeles Rams on September 28, 1969, at the Los Angeles Memorial Coliseum in Los Angeles, California. (National Football League)

San Diego Chargers running back Brad Hubbert carries the football while trying to elude the grasp of Rams defensive tackle Rosey Grier (76) during the Chargers 50-7 preseason loss to the Los Angeles Rams in August of 1967 at San Diego Stadium in San Diego. (National Football League)

Los Angeles Rams tight end Billy Truax (87) is stopped by Packers linebackers Dave Robinson (89) during the Rams 34-21 victory over the Green Bay Packers on October 19, 1969 at the Los Angeles Memorial Coliseum in Los Angeles, California. (National Football League)

Los Angeles Rams running back Willie Ellison (33) carries the football during the Rams 16-7 preseason victory over the New Orleans Saints in August 1967 at Anaheim Stadium in Anaheim, California. This was the first game in the Saints history. (National Football League)

Minnesota running back Clint Jones of the Minnesota Vikings gets pulled down from behind by Pittsburgh Steelers Hall of Fame defensive tackle Joe Greene in a 52-14 win on November 23, 1969 in Metropolitan Stadium in Bloomington, Minnesota. (National Football League)

San Francisco running back Bill Tucker of the San Francisco 49ers gets stopped by Minnesota defensive end Jim Marshall (70) and Gary Larsen (77) in a 10-7 Vikings win on December 14,1969. (National Football League)

The Cleveland Browns offense huddles up during rainstorm in a 42-7 loss to the Los Angeles Rams on December 12, 1965 at the Los Angeles Memorial Coliseum in Los Angeles, California. (National Football League)

Los Angeles Rams defensive David "Deacon" Jones (75) and defensive tackles Merlin Olsen (74) and Roger Brown (78) battle the Baltimore Colts in Los Angeles on Dec. 17, 1967. (National Football League)

NFL Commissioner, Pete Rozelle circa 1960's. (National Football League)

Chicago Bears Hall of Fame running back Gale Sayers (40) avoids the tackle of 49ers linebacker Matt Hazeltine (55) to score his first touchdown on a 80 yard run in a 61 to 20 Bears win over the San Francisco 49ers on December 12, 1965 at Kezar Stadium in San Francisco, California. (National Football League)

Green Bay Packers Hall of Fame quarterback Bart Starr (15) turns to handoff during the 1965 NFL Championship Game against the Cleveland Browns in 1966. The Packers defeated the Browns 23-12 at Lambeau Field. (National Football League)

Cleveland Browns Hall of Fame running back Jim Brown (32) watches from the sideline during an NFL game. (Pro Football Hall of Fame)

Tight end Ron Kramer of the Green Bay Packers makes a catch in a 0 to 37 win over the New York Giants in the 1961 NFL Championship on Dec. 31, 1961 at Lambeau Field in Green Bay, Wisconsin. (AP Photo/Vernon Biever)

Green Bay Packers wide receiver Boyd Dowler catches a pass in front of Dallas Cowboys cornerback Mike Johnson in the Packers 21-17 victory in the 1967 NFL Championship Game on Dec. 31,1967 at Lambeau Field. (AP Photo/Vernon Biever)

Chicago Bears tight end Mike Ditka looks on during a game against the Green Bay Packers circa 1963. (AP Photo/Vernon J. Biever)

Green Bay Packers quarterback Bart Starr (15) during Super Bowl I against the Kansas City Chiefs, Sunday, January 15, 1967 in Los Angeles. The Packers defeated the Chiefs 35-10 and Starr was the MVP of the game. (AP Photo/Vern J. Biever)

Chicago Bears tight end Mike Ditka (89) is tackled after a pass reception against the Green Bay Packers during an NFL football game at Wrigley Field in Chicago on Oct. 16, 1966. (Associated Press)

Green Bay Packers Hall of Fame head coach Vince Lombardi reacts during the final minutes of the 1966 NFL Championship game on the Dallas Cowboys final drive at Cotton Bowl in Dallas, Texas, Jan. 1, 1967. The Packers defeated the Cowboys 34-27 at the Cotton Bowl. (AP Photo/NFL Photos/Vernon Biever)

Green Bay Packers Hall of Fame cornerback Herb Adderley (26) closes in on the ball on May 6, 1960. (AP Photo/Vernon Biever)

Jim Brown (32), fullback of the Cleveland Browns, rounds at right end after receiving pass in the second quarter and picks up yardage for a first down before he is brought down by Tom Franckhauser (32), Dallas Cowboys back. Cleveland won 48-7 in Dallas Texas, on Oct. 16, 1960. (Associated Press)

Mud-covered Paul Hornung, on a one-day pass from military duty, is shown reeling off yardage in third period action for the Green Bay Packers who virtually clinched another divisional title by beating the Detroit Lions 17-9, Nov. 24, 1961, in Detroit. Teammate Gary Knafelc (84) moves in to take out Gary Lowe (43) of the Lions. (Associated Press)

Denver Broncos quarterback Frank Tripucka (18) drives through the New York Titans line standing up to score on a 1-yard touchdown in fourth quarter of American Football League game in New York on Sept. 30, 1962. (AP Photo/Jerry Mosey, File)

Los Angeles Rams defensive end Lamar Lundy (85) sacks Detroit Lions quarterback Karl Sweetan (14) during an NFL game at the Los Angeles Coliseum, Dec. 4, 1966. The Rams defeated the Lions 23-3. (National Football League)

Baltimore Colts' quarterback Johnny Unitas (19) takes off for a second-quarter gain against the Washington Redskins, Dec. 1, 1963. (AP Photo/John Rous)

Kansas City Chiefs' John Sklopan tackles Denver Broncos' Charley Mitchell at Municipal Stadium in Kansas City, Mo. Dec. 8, 1963. (Rich Clarkson/AP Images)

Cleveland Browns fullback, Jim Brown leaps for a gain over right tackle and fellow player Gary Collins (86) in third quarter, in their game with the Dallas Cowboys in Dallas on Oct. 19, 1964. Watching are Cowboy players George Andrie (66) and Chuck Howley (54). The Browns won 20-16. (Associated Press)

Giants quarterback Y.A. Tittle (14), back in the starting role for the New York club, rolls out under a veil of protection to toss a first period pass to teammate Joe Morrison against the Cleveland Browns, Dec. 12, 1964, at Yankee Stadium in New York City. Pass was incomplete. Offering protection for Tittle are, Ernie Wheelwright, (30) Dick James, (47) and Rosey Brown (79). (Associated Press)

Green Bay Packer Jim Taylor (31) takes a handoff, upper left, from quarterback Bart Starr (15), then veers to his left through a hole in the New York line to score touchdown in second period of an NFL title game at Yankee Stadium, Dec. 30, 1962, New York. The seven-yard run was Green Bays only touchdown in the Packers 16-7 defeat of the Giants for their second straight NFL title. Other Packer points came on three field goals. The rest of the players are unidentified. (Associated Press)

Cleveland Browns fullback Jim Brown busts through the Philadelphia Eagles line and sweeps wide for 4 yards and a record-breaking touchdown, Oct. 4, 1965. It was Brown's 106th career touchdown, breaking the mark held by Green Bay's Don Hutson. Brown scored two more touchdowns in Cleveland's 35-17 victory. (Associated Press)

Quarterback Fran Tarkenton (10), of the Minnesota Vikings, is shown in action against the Green Bay Packers, 1966. (Associated Press)

Gale Sayers (40) of the Chicago Bears grinds out yardage against the Green Bay Packers before being brought down by Bob Jeter (21) at the Midwest Shrine exhibition game in Milwaukee on Aug. 18, 1967. (Associated Press)

Green Bay Packers quarterback Bart Starr (15) is caught behind the line of scrimmage by San Francisco 49ers' Roland Lakes (60) during an NFL football game in Green Bay, Wis. on Nov. 19, 1967. (Associated Press)

Leroy Kelly of the Browns goes over a pile of linemen to score the winning touchdown in Cleveland's 14-10 National Football League victory over the Minnesota Vikings on Sunday, Nov. 20, 1967 in Cleveland. (AP Photo/JCW)

Oakland Raiders' Pete Banaszak breaks Kansas City Chiefs' Johnny Robinson tackle during their game at Municipal Stadium in Kansas City, Mo. Dec. 14, 1967. (Rich Clarkson/AP Images)

49ers quarterback George Mira trades arms with defensive back Cornell Green of the Dallas Cowboys in second quarter of National Football League game on Dec. 16, 1967 at Kezar Stadium in San Francisco. Mira gained 20 yards on a keeper play. (Associated Press)

With a ball tucked under his arm, New York Giants Ernie Koy is brought down from behind by St. Louis Cardinals Jerry Stovall in the first period at Yankee Stadium, Dec. 18, 1967, New York. Ernie picked up 15 yards, good for a first down. Cardinal players at right are Larry Stallings (67) and Larry Wilson. The Giants won the final game of the regular National Football season, 37-14. (AP Photo/Harry Harris)

Players spill in all directions as a fumble occurs in the third period of the National Football League Championship game between the Dallas Cowboys and the Green Bay Packers at Lambeau Field, in Green Bay, Wis., Sunday, Dec. 31, 1967. Dallas quarterback Don Meredith (white jersey, #17) fumbles and Herb Adderly of the Packers (#26, partially hidden) reaches to recover it. Played in sub-zero temperatures, the contest was later dubbed, 'The Ice Bowl.' (Associated Press)

Green Bay Packers running back #44 Donny Anderson finds a hole in the Oakland Raiders defense and scores a touchdown during Super Bowl II at the Orange Bowl in Miami, Fla., on Sunday, Jan. 14, 1968. (Associated Press)

Green Bay Packers coach Vince Lombardi is carried off the field after his team defeated the Oakland Raiders 33-14 in Super Bowl II in Miami, Fla. on Jan. 14, 1968. Packers guard Jerry Kramer (64) is at right. (Associated Press)

New York Jets star quarterback Joe Namath is being fitted for his new Mink coat by Hy Rifkin on Aug. 15, 1968. Namath is trying the double-breasted overcoat at Hofstra College in Hempstead, N.Y. where the Jets football team is practicing. Rifkin is the head of Radley Furs, the firm that made the coat which is estimated at $5,000. This is the first mink coat to be worn by a professional male athlete in any sport. (Associated Press)

Atlanta Falcons end Jerry Simmons is tackled by New Orleans defensive tackle Earl Leggett after taking a pass good for three yards in first quarter of National Football League exhibition game at night on Saturday, August 31, 1968 in Atlanta. (AP Photo/JS)

Kansas City Chiefs' Otis Taylor in action against the New York Jets at Municipal Stadium in Kansas City, Mo. Sept. 15, 1968. (Rich Clarkson/AP Images)

Kansas City Chiefs' Mike Garrett (21) hugs the ball after taking a pass from Len Dawson, but keeps his eyes on Boston's Daryl Johnson (23) coming in Fast Nov. 17, 1968 in Kansas City, Mo. Kansas City won 31-17. (Associated Press)

Hall of Fame defensive end David "Deacon" Jones (75) of the Los Angeles Rams rushes Baltimore Colts Hall of Fame quarterback Johnny Unitas (19) in Los Angeles, CA on Dec. 15, 1968. (National Football League)

Sonny Jurgensen (9) Washington Redskins quarterback, gets off pass to receiver Walt Robert (not shown) good for 15 yards in second period of Redskins - Philadelphia game, September 15, 1969 . Making protective block is Redskins back A.D. Whitfield (25) against Eagles defensive end Mel Tom (58). Eagles won, 26-17. (Associated Press).

Green Bay Packers Hall of Fame defensive end Willie Davis tries to stay warm on Aug. 11, 1960. (AP Photo/Vernon Biever)

Houston Oilers running back Joe Dawkins (34) is wrapped up by Denver Broncos' Pete Duranko (55) and Fred Forsberg (52) during an NFL football game in Houston on Nov. 30, 1970. (AP Photo/Ed Kolenovsky)

Bobby Mitchell of the Washington Redskins jumps to haul in a pass from quarterback Norman Snead in the second period of their game against the St. Louis Cardinals in St. Louis, Oct. 15, 1962. The play covered 11 yards and gave the Redskins a first down on their 22-yard line. Moving in to tackle Mitchell are Pat Fisher (37) and Billy Stacy (24) of the Cardinals. The game ended in a 17-17 tie. (AP Photo/Fred Waters)

Lance Alworth, San Diego Chargers flanker makes a diving catch of a pass from quarterback John Hadl during game against the New York Jets in Sandiego, Dec. 12, 1966. (Associated Press)

Paul Hornung dives for a touchdown during a game against the San Francisco 49ers at Milwaukee County Stadium on October 23, 1960. (AP Photo/Vernon J. Biever)

Philadelphia Eagles linebacker Chuck Bednarik (60) walks off the field in the rain during an NFL game against the New York Giants at Yankee Stadium, Nov. 12, 1961. The Giants defeated the Eagles 38-21. (Pro Football Hall of Fame)